IRONMAN Cairns is a highly prestigious triathlon event held annually in Cairns, Queensland, serving as the Asia-Pacific Championship. The swim segment takes place in the pristine waters of the Coral Sea. Athletes start from the palm-fringed shores and embark on a 3.8-kilometer (2.4-mile) open water swim. . The swim course offers a mix of calm and choppy conditions, challenging competitors with varying currents and occasional swells. Following the swim, participants transition to the bike ...